Lanthanide Aminoisophthalate Coordination Polymers: A Promising System for Tunable Luminescent Properties

Abstract

International audienceReactions in water between the disodium salt of 5-amino-1,3-benzenedicarboxylic acid or 5-aminoisophthalate (Na2aip) and lanthanide chlorides lead to two families of coordination polymers with the respective general chemical formulae {[Ln6(aip)7(H2O)24]*2(aip)*6H2O}∞ in which Ln = Tm or Yb (Family 1) and {[Ln2(aip)2(H2O)10]*(aip)*4H2O}∞ in which Ln = La-Er (except Pm) or Y (Family 2). Compounds belonging to Family 1 are isostructural. The crystal structure has been solved for the Er-containing compound. This compound crystallizes in the monoclinic system, space group P21/n (n°14) with a = 13.3439(3) Å, b = 27.3332(8) Å, c = 15.7191(4) Å, β = 97.90(1)°, V = 5680.41(82) Å3 and Z = 4. The crystal structure can be described as the juxtaposition of double helicoidal chains. Additional aminoisophthalate ions insuring the electroneutrality of the network are lying in the interchain space. Compounds belonging to Family 2 are isostructural. The crystal structure has been solved for the Eu-containing compound. This compound crystallizes in the monoclinic system, space group Pn (n°7) with a = 11.3427(2) Å, b = 10.6663(1) Å, c = 15.1639(3) Å, β = 97.8998(9)°, V = 1817.19(5) Å3 and Z = 2. The crystal structure can be described as the juxtaposition of zigzag double chains. Additional aminoisophthalate ligands are lying in the interchain space insuring the electroneutrality of the network. The luminescent properties under UV irradiation of these compounds have been explored. In particular, quantum yields, lifetimes and colorimetric coordinates of the Tb-, the Sm-, and the Dy-containing coordination polymers have been determined

Two new CdII and ZnII coordination polymers incorporating 1-aminobenzene-3,4,5-tricarboxylic acid: synthesis, crystal structure and characterization

“…Aminobenzoic acid derivatives have recently been of considerable interest in coordination chemistry and were proven to be excellent building blocks for assembling novel metalorganic frameworks (MOFs) with different intriguing topologies and potential multifield applications. In these ligands, amino and carboxyl groups can provide N and O atoms as potential electron donors to coordinate with metal ions to produce framework materials (Wang et al, 2014a;Luo et al, 2011). At the same time, ligands with adjacent carboxylic acid groups are popular on account of their flexible mode of coordination, which is conducive to the construction of a variety of structures (Ç olak et al, 2012;Zhang et al, 2015).…”

Color and Brightness Tuning in Heteronuclear Lanthanide Terephthalate Coordination Polymers

“…For more than a decade, lanthanide-based coordination polymers have attracted great attention, because of their fascinating topologies coupled with their potential applications in gas storage, [1][2][3][4][5][6][7][8] catalysis, [9] separation, [10] luminescence, [11][12][13][14][15][16] and molecular magnetism. [17][18][19] Because lanthanide ions are hard Pearson acids, [20,21] ligands that exhibit donor oxygen atoms have been extensively studied.…”

Microwave-assisted synthesis of lanthanide 2,6-naphthalenedicarboxylates: Thermal, luminescent and sorption characterization

“…Rapid development in chemistry of lanthanide-organic frameworks has been observed in the past decade [1][2][3][4][5][6][7][8]. These frameworks consist of metal ions or clusters linked to each other through bridging organic ligands.…”

“…Intensity of emission of the lanthanide centers in MOFs can be efficiently enhancement by using organic ligand which acts as ''antenna'' in the energy transfer process to the appropriate metal energy level. Although a number of lanthanide-based MOFs have been documented [1][2][3][4][5][6][7][8][9][10][11][12][22][23][24][25][26][27][28][29][30][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54], the luminescence investigations focus mainly on their fundamental properties whereas lifetimes of excited states of Ln(III) ions are less documented [36,42,44,46,50,54].…”